Everyone, including my own faction if possible.

Eldar. Preferably in a way that makes them feel helpless and alone and worthless.

Chaos and Eldar... gonna enjoy it allot!

The enemy's of the Craft-worlds will all meet there end at my blade. The servants of chaos will be the sweetest of all to destroy.

Elder - just cos they're weird looking!

Now we all know the only real answer here is going to have to be orks. Firing into the disorganized F2P horde is probably going to make for some fond memories later down the line.

Eldar. Chaos might be horrific and its servants constantly try to murder me for their gods, but my hatred of them pales in comparison to my hatred of the smug Space Elves.

"Come all you Xeno scum and fallen heretics! Come face the one true might of the universe and wither under the Golden Throne's gaze!"

Killing Ultramarines over and over is going to be the greatest evil joy.

Suffer not the Alien to live.